They hatched! Should I bring them inside or leave them under mama...

Horray! My hen is now a mama! Her 3 eggs began hatching out today, 2 are out completly and can't see what is going on with the third.

I am not sure if I should leave them in the coop tonight, all tucked under her, or if I should bring mama and the chicks in and put the heat lamp on in the brooder for them. It is about 50 degrees now, and raining. It might drop into the 40's tonight. I know I should trust mother nature, but it's soooo hard to sit back and not interfere.

So, do you all think I should bring them in?

Here's an image of where they are (from before the second came out of its shell):